Physics-
General
Easy

Question

For what value of unknown resistance X, the potential difference between B and D will be zero in the circuit shown in the figure

  1. 4 capital omega    
  2. 6 capital omega    
  3. 2 capital omega    
  4. 5 capital omega    

The correct answer is: 6 capital omega


    For balanced Wheatstone bridge fraction numerator P over denominator Q end fraction equals fraction numerator R over denominator S end fraction
    Þ fraction numerator 12 over denominator left parenthesis 1 divided by 2 right parenthesis end fraction equals fraction numerator x plus 6 over denominator left parenthesis 1 divided by 2 right parenthesis end fraction Þ x equals 6 capital omega

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